NOAA
Noaa: Earth System Research Laboratory: Psd: Interactive Climate Map of u.s.
Investigate climate trends across the United States by clicking on individual states and then specific cities. Data is presented from 1961-1990.
Khan Academy
Khan Academy: Gallery: How Do Earth and Life Interact?
Explore the biosphere, zoom in on some unique ecosystems, and learn how activity in the Solar System and plate tectonics can affect the climate and life on the planet.